package cn.edu.hust.cm.vs;

import android.content.Context;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.util.Pair;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.bumptech.glide.Glide;
import com.bumptech.glide.request.animation.GlideAnimation;
import com.bumptech.glide.request.target.SimpleTarget;


/**
 * A simple {@link Fragment} subclass.
 * Activities that contain this fragment must implement the
 * {@link BlurImageFragment.OnFragmentInteractionListener} interface
 * to handle interaction events.
 * Use the {@link BlurImageFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class BlurImageFragment extends DialogFragment {
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "url";
    private static final String ARG_PARAM2 = "algorithm";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    private OnFragmentInteractionListener mListener;

    public BlurImageFragment() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment BlurImageFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static BlurImageFragment newInstance(String param1, String param2) {
        BlurImageFragment fragment = new BlurImageFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
        setStyle(STYLE_NO_TITLE, 0);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_blur_image, container, false);
        final ImageView ivBlurImg = (ImageView) view.findViewById(R.id.iv_blur_img);
        final TextView tvBlur = (TextView) view.findViewById(R.id.tv_blur);

        final String url = mParam1;
        final String algorithm = mParam2;
        Glide.with(this).load(url).asBitmap().skipMemoryCache(false)
                .into(new SimpleTarget<Bitmap>(135, 135) {
            @Override
            public void onResourceReady(final Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation) {

                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        Pair<Bitmap, String> res;
                        if (BlurImages.BLUR_FAST.equals(algorithm)) {
                            res = BlurImages.doFastBlur(resource);
                        } else if (BlurImages.BLUR_RS.equals(algorithm)) {
                            res = BlurImages.doRsBlur(getContext(), resource);
                        } else if (BlurImages.BLUR_STACK.equals(algorithm)) {
                            res = BlurImages.doStackBlur(resource);
                        } else if (BlurImages.BLUR_NONE.equals(algorithm)) {
                            // res = BlurImages.doNoneBlur(resource);
                            res = Pair.create(resource, "");
                        } else {
                            res = null;
                        }

                        if (getActivity() == null) {
                            return;
                        }

                        final Pair<Bitmap, String> tmp = res;

                        getActivity().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                if (tmp != null) {
                                    ivBlurImg.setImageBitmap(tmp.first);
                                    tvBlur.setText(tmp.second);
                                } else {
                                    Toast.makeText(getActivity(), "blur出错!", Toast.LENGTH_SHORT).show();
                                    ivBlurImg.setImageBitmap(resource);
                                }
                            }
                        });

                    }
                }).start();
            }
        });

        return view;
    }

    // TODO: Rename method, update argument and hook method into UI event
    public void onButtonPressed(Uri uri) {
        if (mListener != null) {
            mListener.onFragmentInteraction(uri);
        }
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        void onFragmentInteraction(Uri uri);
    }
}
